1. 1.3 Segments, Rays, Lines and Planes

2. Parts of Lines
Segment The part of a line consisting of two endpoints and all the points in between

3. Parts of Lines
Ray The part of the line consisting of one endpoint and all the points of the line on one side of the endpoint

4. Parts of Lines
Opposite Rays Two collinear rays with the same endpoint Opposite rays always form a line!

5. Practice
Name the segments Name the rays Name a pair of opposite rays

6. Types of Lines
Intersecting Same plane? Intersect?

7. Types of Lines
Parallel Same plane? Intersect?

8. Types of Lines
Skew Same plane? Intersect?

9. Types of Lines Skew lines are hard to see. Activity Time!
See directions for making model on lesson plan sheet.

10. Example
Name all segments that intersect Name all segments that are parallel to Name all segments that are skew to

11. Parallel Planes
Parallel planes are planes that do not intersect. Name a plane that is parallel to plane ABCD. Name another pair of parallel planes.

12. Practice Are and in the same plane?
2. Name all the segments parallel to

13. Practice
Name all segments skew to
4. Draw on the diagram.

14. Practice
Mark a point I on the diagram so that and are opposite rays.

15. Exit Homework